package Bi_Tree;

public class TreeNode {
    public  int val;
    public TreeNode left;
    public TreeNode right;

   // TreeNode() {}
    TreeNode(int val) { this.val = val; }
    TreeNode(int val, TreeNode left, TreeNode right) {
        this.val = val;
        this.left = left;
        this.right = right;
    }

    public TreeNode() {

    }
}
